DARYL HANNAH, 52

In 1984, Hannah brought her blue-eyed blonde beauty to the big screen as a naive mermaid opposite Tom Hanks in the comedy Splash; more hits followed and by 1987 (left) she was a bona fide star. More than 25 years later, the actress and environmental activist, who stars with Brooke Shields in June 2013's The Hot Flashes, has retained her beach-beauty looks in part by reading labels and avoiding anything containing possible carcinogens: "I use a pure cacao (raw chocolate) oil on my body and hair, and [an] olive-oil-based salve on my face, plus a vegan biodegradable soap," she explains. And, let's assume, she still relies on lots of water.